Does your computer have a DVI, Composite or VGA port on it? These are the standard connections that are used to output video to such a device.Does your computer have a DVI, Composite or VGA port on it? These are the standard connections that are used to output video to such a device.

Projectors typically require RCA (yellow - round - single pin) or S-Video (black - round - multipin) connections. Look for a key on your keyboard that has a monitor symbol on it (sometimes 2 symbols - on/off). Once you have connected the projector and turned it on, tap the monitor key and you should see your desktop projected. I've also seen laptops where you need to enable the secondary display thru the 'Display Settings'.

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I'm not sure as to which OS you're using, but for Windows 7, follow these instructions...

1) Open Control Pannel
2) In the search bar in the upper right hand corner type "Connect to a projector" (Without the quotations)
3) Select the option Connect to a projector
4) A selection box will appear. Select the option that you want.

Then you can drag windows either out from your main monitor, to up, down, or the sides debends on where you set the 2nd display, you can also change the position of the 2nd screen by draging it around in the middle.

Virtually all IBM and Lenovo ThinkPad and ThinkCenter laptops allow you to hook up an additional monitor or projector to the computer. When you add an external monitor or projector to your notebook, you can choose to view the display on the computer, on the external device, or on both the laptop and the external monitor or projector at the same time. Toggling between viewing devices is as simple as pressing a couple of keys on the keyboard.

stop the dual monitor moded and it will project what is on the Desktop screen

for this right click on desktop -> properties -> (on the window) Settings here take away the check box for "Extend my Windows desktop to this monitor" and you can have what ever is displayed on your desktop on the screen

but if you keep the the existing setup then you can just drag the windows to the right or left edges and it will move on to the screen and you can use the projector image as an extended monitor, this will be useful when you want to have your presentation and your background work/ Document seperate from the viewing audience, try it you may like it

please check the manual for the setup instructions also consult your notebook manual to look for the key stroke to extend the display to the projector.Ensure the little details like input mode and that the lens coveris removed etc.Also check this video for general instruction on connecting the projector to notebook(http://www.youtube.com/watch?v=R8UN761ODCo)